Split keyboard

ABSTRACT

A keyboard includes a plurality of keys associated with alphanumeric characters including the letters A-Z. The keys are split into a left side section and a right side section. The left side section is oriented at least partially above the right side section, or the right side section is oriented at least partially above the left side section. The keyboard is stationary. A mobile communication device includes the keyboard.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.10/825,500, filed Apr. 15, 2004, now U.S. Pat. No. 7,489,301.

FIELD

This technology relates to a split keyboard for an electronic device. Inparticular, the technology concerns a split keyboard for a handheldmobile communication device, such as a mobile phone.

BACKGROUND

Different standard keyboard arrangements are known. The most widely usedEnglish-language alphabetic key arrangement is the QWERTY arrangement.Other types of standard English-language alphabetic key arrangementsinclude the QWERTZ arrangement, the AZERTY arrangement, and the DVORAKarrangement. Each of these arrangements, when presented as a full-sizekeyboard, utilizes 26 keys for 26 different characters.

Numeric characters are often presented along with alphabetic characterson keyboards of communication devices, such as telephones. One standardsetting body, the International Telecommunications Union (“ITU”), hasestablished phone standards for the arrangement of alphanumeric keys.One such standard, shown in FIG. 1, corresponds to ITU Standard E.161,entitled “Arrangement of Digits, Letters, and Symbols on Telephones andOther Devices That Can Be Used for Gaining Access to a TelephoneNetwork” (also known as ANSI TI.703-1995/1999 and ISO/IEC 9995-8:1994).According to this standard, ten keys are used to present the alphabeticcharacters A-Z and the numbers 0-9. In order to enter alphabeticcharacters, the user may be required to multi-tap the keys until thedesired character appears on a display screen, among other known entrytechniques.

Mobile communication devices that include a combined text-entry keyboardand a telephony keyboard are known. Examples of such mobilecommunication devices include mobile stations, cellular telephones,wireless personal digital assistants (PDAs), two-way paging devices, andothers. Combining a traditional-style text-entry keyboard (e.g., aQWERTY-style keyboard) with a traditional-style telephony keyboard onthe same mobile communication device typically involves undesirableergonomic and/or intuitive user interface compromises. The size of thekeyboard is often limited by the size of the device, making the keyboardmore difficult to use.

One prior art device that incorporates a combined alphabetic/numerickeyboard is the RIM Blackberry 950 mobile communication device, shown inFIG. 2. In this device, numeric characters share keys with alphabeticcharacters on the top row of the QWERTY keyboard. Another prior artdevice that incorporates a combined alphabetic/numeric keyboard is theRIM Blackberry 6210 mobile communication device, shown in FIG. 3. Thisdevice utilizes numeric characters in a numeric phone key arrangementconsistent with the ITU Standard E.161, discussed above. The numericcharacters share keys with alphabetic characters on the left side of thekeyboard. Both of these devices are designed for entry of charactersusing the thumbs.

SUMMARY

In accordance with the teachings described herein, a keyboard comprisesa plurality of keys associated with alphanumeric characters includingthe letters A-Z and at least the numbers 1-9. The keys are split into aleft side section and a right side section. The left side section isoriented at least partially above the right side section to define anupper section corresponding to the left side section and a lower sectioncorresponding to the right side section. Alternatively, the right sidesection is oriented at least partially above the left side section todefine an upper section corresponding to the right side section and alower section corresponding to the left side section.

All of the keys of the upper section may be positioned above all of thekeys of the lower section. Part of the upper section may verticallyoverlap part of the lower section. Part of the upper section maytransversely overlap part of the lower section.

The alphanumeric characters may represent a QWERTY-style keyarrangement. The upper section may include keys associated withalphabetic characters “QWERTASDFGZXCV” and the lower section may includekeys associated with alphabetic characters “YUIOPHJKLBNM”.

The upper section may comprise at least three rows and five columns ofkeys and the lower section may comprise at least three rows and fivecolumns of keys. The five columns of the upper section may alignlongitudinally with the five columns of the lower section.Alternatively, the five columns of the upper section may be offset fromthe five columns of the lower section.

The left side section of the keys may comprise a first row associatedwith the characters “Q”, “W”, “E”, “R”, and “T”, a second row may beassociated with characters “A”, “S”, “D”, “F”, and “G”, and a third rowmay be associated with characters “Z”, “X”, “C”, and “V”. The right sidesection of keys may comprise a first row associated with the characters“Y”, “U”, “I”, “O”, and “P”, a second row associated with characters“H”, “J”, “K”, and “L”, and a third row associated with characters “B”,“N”, and “M”.

The left side section of keys may be associated with numbers “1-9”, withthe “1”, “2”, and “3” being associated with the first row, the “4”, “5”,and “6” being associated with the second row, and the “7”, “8”, and “9”being associated with the third row. A key associated with a spacefunction and key associated with the number “0” may also be provided. Inone example, the space function and the number “0” are associated withthe same key.

The right side section of keys may be associated with numbers “1-9”,with the “1”, “2”, and “3” being associated with the first row, the “4”,“5”, and “6” being associated with the second row, and the “7”, “8”, and“9” being associated with the third row. The keyboard may also include akey associated with the space function and a key associated with thenumber “0”. The number “0” may be associated with a key in one of theleft side section or the right side section.

At least some of the plurality of keys may be further associated withsymbols or functions. The keyboard may also include a thumb wheelcoupled to the keyboard. In addition, a key associated with a “send”function, a key associated with an “end” function, and at least one keyassociated with a “shift” function may be provided. The keyboard mayalso include a key associated with the caps function. More than one capsfunction key can be provided, with a caps key being associated with theupper section and a caps key being associated with the lower section.

In another example, a mobile communication device comprises a housinghaving a face and the keyboard, described above, associated with theface.

In yet another example, a mobile communication device comprises ahousing having a face and a keyboard associated with the face of thehousing. The keyboard includes a plurality of keys associated with bothalphabetic and numeric characters arranged in a standard alphabeticformat selected from a group consisting of QWERTY, QWERTZ, AZERTY, andDVORAK. The keyboard is split into a left side section and a right sidesection, with one of the left or right side sections being disposed atleast partially above the other section on the face of the housing.

In a further example, a method for inputting alphanumeric charactersinto a mobile communication device comprises holding a mobilecommunication device having the keyboard, described above, with twohands such that the thumbs of the hands align with keys on the keyboard,utilizing a thumb of one hand to enter key strokes on the left sidesection of the keyboard, and utilizing a thumb of the other hand toenter keystrokes on the right side section of the keyboard. One of thethumbs is positioned above the other thumb on the face of the housing.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

FIG. 1 is a plan view of a standard numeric phone/alphabetic keypadarrangement according to ITU standard E.161;

FIG. 2 is an elevated view of a prior art handheld mobile communicationdevice;

FIG. 3 is an elevated view of a prior art handheld mobile communicationdevice;

FIG. 4 is a perspective view of a handheld mobile communication devicehaving an example split keyboard;

FIG. 5 is a perspective rear view of the handheld mobile communicationdevice of FIG. 4;

FIG. 6 is a perspective view of an a handheld mobile communicationdevice having an alternative example split keyboard;

FIG. 7 is an elevated front view of a handheld mobile communicationdevice having yet another example split keyboard;

FIG. 8 is an elevated front view of a handheld mobile communicationdevice having a further example split keyboard;

FIG. 9 is an elevated front view of a handheld mobile communicationdevice having another example split keyboard; and

FIG. 10 is a block diagram illustrating an example mobile communicationdevice system.

DETAILED DESCRIPTION

With reference now to the drawings, the example keyboard 14 is depictedin FIGS. 4-9 as a split alphanumeric keyboard or keypad that includes afull alphabetic array of letters A-Z (hereinafter referred to as “fullkeyboard” or “full size”) and the numbers 0-9. In one example, a totalof 26 alphabetic keys are provided, with additional keys being utilizedfor additional numbers, symbols, and or functions. In all of theexamples, at least some numbers share keys with letters. The termkeyboard or keypad is used interchangeably herein to refer to a set ofkeys used for inputting data into a device. It is preferred that atleast some of the keys be multi-functional, meaning that the keys can beused to input more than one of the following: letters, numbers, symbols,and functions. In one example, the majority of keys aremulti-functional.

The keys on the keyboard 14 are preferably used for both text entry andtelephony entry. The numeric keys are preferably used in a telephonymode and the alphabetic keys are preferably used in a text entry mode.Symbols and functions may be used in either or both the telephony andtext entry modes. In order to switch between text entry and telephonymodes, a mode selection switch may be utilized, such as a toggle key.Sample toggle keys include the “alt” or “shift” key, where the userselects one of these keys to switch data input from text-entry totelephony mode, or vice versa.

Alternatively, software may be used to determine the mode of entry. Ifthe user is utilizing the telephony application, the default data entrymode will be numbers. If the user is utilizing the text-entryapplication, such as when composing an email, the default data entrymode will be text. When in each of these modes, the user may switchmodes manually by utilizing a toggle key. For example, to enter text ina telephony application, the user selects the “shift” key 20 and thenpresses the desired alphanumeric key corresponding to the desiredletter. Software could also be used to predict whether the user is intelephony or text-entry mode, based upon the keystrokes that are enteredby the user, the example keyboard 14 not being limited by the modeselection function.

The various split alphanumeric keyboard arrangements described hereinare directed to the field of small, hand-held electronic mobilecommunication devices 10, such as mobile stations, cellular telephones,wireless personal digital assistants (PDAs), personal informationmanagers (PIMs), two-way paging devices, and others. For simplicity, thedrawings depict a cellular telephone in the form of a flip-type phone 22in FIGS. 4-6 and a “candy bar”-type phone 24 in FIGS. 7-9. Any type ofmobile communication device may be utilized with the example keyboards14.

In order to keep the form factor of the mobile communication device 10small enough to be worn on the body of a user, the keyboard 14 must besmall. The example keyboards 14 are designed for optimized usage withthe thumbs. This is accomplished first by providing a keyboard 14 havingkeys that are oriented as they appear on a standard keyboard such thatthe keyboard layout is familiar to the user. The example keyboard 14splits the standard keyboard into a left and right half, with either theleft half 26 or the right half 28 being positioned above the other halfon the face 30 of the communication device 10. This enables a user toutilize his or her thumbs to select keys, but with one thumb positionedabove the other thumb during key selection, rather than side by side, aswith known devices that utilize a standard full keyboard. The provisionof a split keyboard allows for a full size keyboard that takes up lesswidth on the face 30 of the communication device 10, allowing forplacement of a full-sized keyboard on a cellular telephone, for example.As is readily apparent from the drawings, the example keyboard 14 allowsfor the use of a full-size alphanumeric keyboard on a standard sizecellular phone.

The mobile communication devices 10, shown in FIGS. 4-9, include ahousing 12, a display 16, a keyboard 14, a microphone 32, and a speaker34. The housing 12 is configured to be held with one or two hands whilethe device is in use. The device 10 is preferably small enough to fitinside a standard purse or suit jacket pocket. The microphone and thespeaker (shown in phantom) are positioned inside the housing 12, withrespective apertures 36 disposed through the housing 12 associated witheach device. Other internal components of the device 10 may also bemounted in the housing 12. For example, a digital camera 38 may beprovided, as well as additional auxiliary I/O devices (not shown), asknown by those of skill in the art.

As shown in FIGS. 4-6, a cellular telephone in the form of a flip-stylephone 22 includes an upper housing section 40 and a lower housingsection 42. The upper housing section 40 and lower housing section 42are connected by a hinge 44, such as the double hinge depicted in thefigures. The phone shown in the Figures is in an open position, wherethe upper housing section 40 is positioned at an angle Θ ofapproximately 150° to 180°. In a closed position, which is not shown,the upper housing section 40 folds down upon the lower housing section42 around the hinges 44 such that the upper housing section 40 seatsupon the lower housing section 42, as known by those of skill in theart.

The display 16 is positioned in the upper housing section 40 and thekeyboard 14 is positioned in the lower housing section 42. A portraitLCD is depicted. As shown in FIG. 5, the phone also includes a secondaryLCD 46 on an exterior surface of the upper housing section 40, as knownby those of skill in the art. A digital camera 38 is also associatedwith the upper housing section 40 of the phone 22. The lower housingsection 42 also houses an antenna 48 and a battery 50. The battery 50and antenna 48 may be disposed inside the housing section 40 and mayinclude access doors (not shown), if desired. Advertising indicia 52,such as a logo, may be positioned at various points on the housing 12,if desired.

As shown in FIGS. 4 and 6, the full size keyboard is preferablypositioned on an upper face 30 of the lower housing section 42.Additional keys are also associated with the upper face 30. Other keysare positioned on the side wall 54 of the lower housing section 42. Asshown in FIGS. 4 and 6, an escape key 56 and a thumb wheel 58 arepositioned on the side wall 54. Alternatively, the thumb wheel 58 andescape key 56 may be positioned on the upper face 30 of the lowersection 42, at other points on the lower or upper housing sections42,40, or not present, if desired. The thumb wheel 58 is depicted onboth the upper face 30 of the lower housing section 42 and on the sidewall 54 of the lower housing section 42. In another example, only onethumb wheel 58 is present on the device 10, although more than one maybe present if desired. Two thumb wheels 58 are depicted in order tosignify the different possible locations for a thumb wheel 58.

In each of the examples shown in FIGS. 4, and 6-9, the full sizekeyboard is split into a left side section 26 and a right side section28. Both the left and right side sections 26, 28 include at least threerows and at least five columns. The left side 26 section includes keysassociated with alphabetic characters “Q”, “W”, “E”, “R”, and “T” in afirst row 60, keys associated with alphabetic characters “A”, “S”, “D”,“F”, and “G” in a second row 62, and keys associated with alphabeticcharacters “Z”, ““X”, C”, and “V” in a third row 64. Since keys in thethird row 64 are associated with fewer than five alphabetic characters,keys that are not associated with alphabetic characters mayalternatively be associated with numbers, symbols, or functions. Theright side section 28 includes keys associated with alphabeticcharacters “Y”, “U”, “I”, “O”, and “P” in a first row 60, keysassociated with alphabetic characters “H”, “J”, “K”, and “L” in a secondrow 62, and keys associated with alphabetic characters “B”, “N”, and “M”in a third row 64. Since keys in the second 62 and third 64 rows of theright side section 28 are associated with fewer than five alphabeticcharacters, keys that are not associated with alphabetic characters mayalternatively be associated with numbers, symbols, or functions.Alternatively, in both the left and right side sections 26,28, there maybe provided only 26 keys, with the non-alphabetic keys (e.g., those notassociated with alphabetic characters), being absent altogether.

One of the left side or the right side sections 26,28 is positionedabove the other section as an upper section 66 and a lower section 68.In one example, the left side section 26 is oriented at least partiallyabove the right side section 28 to define an upper section 66corresponding to the left side section 26 and the lower section 68corresponding to the right side section 28. In another example, theright side section 28 is oriented at least partially above the left sidesection 26 to define the upper section 66 corresponding to the rightside section 28 and the lower section 68 corresponding to the left sidesection 26.

Either of the left or right side sections 26, 28 may be associated witheach of the numbers “0-9”, or fewer than the numbers 0-9. For instance,some of the numbers could be associated with the upper section 66, someof the numbers could be associated with the lower section 68, and someof the numbers could be associated with other keys, that are not part ofthe upper and lower sections 66, 68. It is preferred that at least thenumbers “1-9” 86 are associated with one of the upper or lower sections66, 68 so that the numbers may be aligned in a traditional telephonygrid, with the key associated with the number “0” 70 being positioned inthe direct vicinity of the remainder of the numbers “1-9” for ease ofuse. For instance the numbers “1-9” 86 could be associated with keys inthe upper section 66 and the number “0” 70 could be associated with keysin the lower section 68. Alternatively, the “0-9” could be associatedwith keys in only the upper section 66 or only the lower section 68. Avariety of options for numeric placements are available, as will bereadily evident to one of skill in the art.

Additional keys, above and beyond those present in the upper and lowersections 66, 68 may also be positioned on the face 30 of the housing 12.For instance, a space bar 72; caps lock/caps 74; power key 76; backlight key 76; send key 78; end key 80; escape key 56; arrow keys 82;thumb wheel 58; or other keys may also be utilized, as desired. Thethumb wheel 58 is an additional input means for control of functionsthat might otherwise be controlled by a keyboard that included functionkeys. The thumb 58 wheel is preferred to encourage data entry usingthumbs and to minimize the number of keys on the keyboard 14. It can beused to control menus (not shown) on the display 16 and to inputfunctions relevant to data input. The thumb wheel 58 is preferablypositioned in close proximity to the keyboard 14 to enable the easytransition from thumb typing to thumb control of forms and functions viathe thumb wheel 58.

FIG. 4 depicts a split keyboard 14 where the left side section 26 is thelower section 68 and the right side section 28 is the upper section 66.Each of the rows 60, 62, 64 are arcuate and the keys are oval shaped andslanted. The left side 26 keys are slanted to the left and the rightside 28 keys are slanted to the right. The upper section 66 ispositioned entirely above the lower section 68, and the upper and lowersections 66, 68 are delineated by a surface treatment 84 on the face 30of the lower housing section 42, such as by being encircled at least inpart by a line or other markings 84 on the surface. The upper section 66is offset about one column width to the right relative to the lowersection 68, so that the lower section 68 is positioned slightly to theleft of the upper section 66. This allows for greater ease in inputtingkeystrokes by the user, whose left and right hands can be offsetslightly from one another. Alternative examples, discussed below inconnection with FIG. 8, have the upper and lower sections 66, 68positioned in a non-offset manner, such that the upper and lowersections 66, 68 are symmetric about a longitudinal axis X-X of thehousing 12.

In addition to the alphabetic keys discussed above, the left sidesection 26 also includes the numbers “1-9” 86 and a shift function 20,as well as various symbol keys, including a “#”, “(”, “*”, “/”, and “?”.The shift function 20 is used to select between the letters, number,symbols, or functions associated with each key. For example, the shiftkey 20 may be selected to select between text entry mode (the charactersassociated with the lower half of the keys) and telephony mode (thecharacters associated with the upper half of the keys). Other symbols orfunctions may alternatively be utilized. The right side section 28includes various symbols and functions, such as “)”, “−”, “+”, leftshift, right shift, “:”, “′”, “″”, “@”, backspace/delete, “!”, “,”, “.”,symbol, and return/enter. The return/enter function 98 is associatedwith the fifth column 88 and third row 64 of the upper section 66, in alocation that may be more familiar to a user. Additional keys are alsoassociated with the face 30 of the device 10, including a space key 72,a caps lock/caps key 74, a power/backlight key 76, and a key associatedwith the number “0”/caps key 70, 90. The shift key 20 shifts betweenupper/lower characters on each key while the caps key 74, 90, which isused in text entry mode, selects capital or lower case letters.

A thumb wheel 58 may be associated with the face 30 of the device 22, beassociated with a side wall 54 of the device, or both. In addition, anescape key 56 is shown positioned on the side wall 54 of the device 22below the thumb wheel 58. As is evident a caps function 74, 90 isassociated with both the upper section 66 and the lower section 68, suchthat the caps function 74, 90 may be selected by the user with eitherthumb during keystroke entries. In addition, the space function 72 ispositioned directly below the lower section 68 in a position that isintended to be more familiar to a user, such as with a traditional fullkeyboard where the space function is associated with a key that is inthe bottom, center of the keyboard 14.

FIG. 6 depicts an example similar to that of FIG. 4, but with the leftside section 26 being the upper section 66 and the right side section 28being the lower section 68. The upper section 66 is offset horizontallyfrom the lower section 68 by about one column width. The rows 60, 62, 64are arcuate and the keys are oval shaped. The left side keys 26 areslanted to the left while the right side keys 28 are slanted to theright. The left side keys 26 include the numbers “1-9” 86, as well assymbols “#”, “(”, “*”, “/”, “?”, and the shift function 20. The shiftfunction 20 is positioned in the first column 92, third row 64 of theupper section 66, in a position that may be familiar to a user of atraditional full keyboard. The shift function 20 is used to selectbetween text entry and telephony mode, as discussed in connection withFIG. 4. The right side section 28 includes symbols and functions “)”,“−”, “+”, left shift, right shift, “:”, “′”, “″”, “@”, backspace/delete,“!”, “,”, “.”, sym, and return/enter. The return/enter key is positionedin the third row 64, fifth column 88 of the right side section 28, in aposition that may be familiar to a user of a traditional full keyboard.

Additional keys are also positioned on the face 30 of the device housing42 shown in FIG. 6. The number “0” 70 is positioned directly beneath theupper section 66 and positioned adjacent the lower section 68, in thevicinity of the remainder of the number keys. A caps function 90 is alsoassociated with the “0” key 70 for use in selecting lower and upper caseletters. In addition, a space key 72 is positioned below the lowersection 68 in a centered position, and an additional caps/caps lock key74 is positioned adjacent the space key 72 and below the lower section26. A caps key 90 is associated with both the upper and lower sections66, 68 in order to allow ease in selecting capital or lower caseletters. In addition, a power/backlight key 76 and thumb wheel 58 arepositioned below the lower section 66. Alternatively, a thumb wheel 58may be positioned on the side wall 54 of the device 22, along with anescape key 56. The escape key 56 may also be positioned on the face 30of the housing 42.

FIGS. 7-9 depict a “candy-bar” type phone 24 that utilizes the examplesplit keyboard 14. The candy-bar type phone 24 includes a housing 12with the LCD display 16 and keyboard 14 positioned on a face 30 of thehousing 12. The display 16 is positioned on the upper part 94 of theface 30 and the keyboard 14 is positioned on the lower part 96 of theface 30. The phone 24 includes a speaker 24 (shown in phantom)positioned inside the housing 12 beneath apertures 36 above the display16, and a microphone 36 (shown in phantom) positioned inside the housingbeneath aperture 36 on the lower part 96 of the face 30. A digitalcamera 38, battery 50, antenna 48, and auxiliary I/O devices may beassociated with the phone 24, as known by those of skill in the art. Inaddition, advertising indicia 52, such as a logo, may be positioned onthe housing 12, if desired.

As shown in FIGS. 7-9, the full size keyboard 14 is preferablypositioned on the lower part 96 of the face 30 of the housing 12.Additional keys are also associated with the face 30. Other keys mayalternatively be positioned on the side or back wall of the housing 12,if desired (not shown).

FIG. 7 depicts an example keyboard 14 where the left side section 26 isthe upper section 66 and the right side section 28 is the lower section68. The upper section is offset horizontally from the lower section 68,with the columns of the upper section 66 being offset to the left byabout one column width. The upper and lower sections 66, 68 each include5 columns and three rows. The columns of the upper and lower sections66, 68 do not align, although they could, if desired. The rows andcolumns are straight and the keys are round. Alternatively, the rowscould be curved or have other shapes, and the keys could be oval, orother shapes. The numbers “1-9” 86 are associated with keys in the lowersection 68 and a space key 72 is centered on the housing 12 below thelower section 68 and is associated with the “0” key 70 such that the “0”is positioned directly beneath the remainder of the numbers “1-9” 86.The upper and lower sections 66, 68 are each independently delineated bya surface treatment 84, such as a raised or recessed surface or anengraved or embossed surrounding line.

The upper section includes keys associated with the following functionsand symbols: “)”, “−”, “+”, left shift, right shift, “:”, “′”, “″”, “@”,“;”, shift, “,”, “.”, “?”, and “!”. The shift function 20 is associatedwith the third row 64 of the first column 92. The lower section 68includes keys associated with the following functions and symbols: “#”,“(”, “*”, backspace/delete, and return/enter. The return/enter key 98 isassociated with the third row 64 of the fifth column 88 of the lowersection 68. The housing 12 also includes keys for talk 78, end 80, leftarrow 82, right arrow 82, up arrow 82, down arrow 82, escape 56,power/backlight 76, and caps/caps lock 74. The caps/caps lock 74 andpower/backlight 76 keys are positioned below the lower section 68adjacent the space key 72. The talk 78, end 80, and arrow keys 82 arepositioned above the upper section 66, and a thumb wheel 58 and escapekey 56 are positioned directly to the right of the upper section 66.

FIG. 8 depicts a similar candy-bar type phone 24 that utilizes theexample split keyboard 14. In this example, the upper and lower sections66, 68 are positioned directly above and below one another so that thecolumns of each section align with the other section. The right sidesection 28 is the upper section 66 and the left side section 26 is thelower section 68. Each section includes three rows and five columns. Thenumbers “1-9” 86 are associated with keys in the lower section 68 in themiddle three columns, and a space bar/“0” key 72, 70 is positioned belowthe lower section 68 centered on the housing 12. In particular, the “0”70 key is centered beneath the remainder of the numbers “1-9” 86 on theface 30 of the housing 12. This example includes an additional send key78, end key 80, escape key 56, thumb wheel 58, caps/caps lock key 74,and power/backlight key 76. The thumb wheel 58 is positioned near thebottom of the face 30 adjacent the lower section 68, the power/backlightkey 76, the caps/caps lock key 74, and the space bar 72. The escape key56 is positioned adjacent the upper section 66. The send and end keys78, 80 are positioned above the upper section 66, directly below thedisplay 16.

The upper section includes keys associated with the following symbolsand functions: “)”, “−”, “+”, left shift, right shift, “:”, “′”, “″”,“@”, backspace/delete, “!”, “,”, “.”, sym, and return/enter. Thereturn/enter key 98 is positioned in the third row 64, fifth column 88.The lower section 68 includes keys associated with the following symbolsand function: “#”, “(”, “*”, “/”, shift, and “?”. While a singlecaps/caps lock key 74 is shown as being associated with the lowersection 68, an additional caps key 90 or caps/caps lock key 74 may alsobe associated with the upper section 66, such that upper and lower casenumbers can be selected with either thumb of the user.

FIG. 9 depicts another example of the candy-bar type phone 24, where aportion of the upper section 66 is positioned above a portion of thelower section 68 and a portion of the lower section 68 is positionedabove a portion of the upper section 66. The right side section 28 isthe upper section 66 and the left side section 26 is the lower section68. Both the upper and lower sections 66, 68 include five columns andthree rows. The left part of the upper section 66 is positioned at ahigher vertical position on the face 30 of the housing 12 than the rightpart of the upper section. In addition, the left part of the lowersection 68 is positioned at a higher vertical position on the face 30 ofthe housing 12 than the right part of the lower section 68.Alternatively, the upper and lower sections 66, 68 could be arranged ina reverse orientation (not shown), or the left side section 26 could bethe upper section 66 and the right side section 28 could be the lowersection 68.

The upper section 66 is shown offset from the lower section 68, so thatthe columns of the upper section 66 are offset to the right by about onecolumn width. Other offset spacing may alternatively be utilized, ifdesired, or the columns of the upper and lower section 66, 68 could bealigned longitudinally on the face of the device. The numbers “0-9” 86are associated with keys in the lower section 68, with the “1”, “4”, and“7” being positioned in the first column 92, the “2”, “5”, and “8” beingassociated with the second column 102, the “3”, “6”, and “9” beingassociated with the third column 104, and the “0” associated with thefourth column 114. In addition, the “#” and “*” are also associated withthe fourth column 114 of the lower section 68. The lower section 68 alsoincludes keys associated with “(”, “/” and “?”.

The upper section 66 includes keys associated with “)”, “−”, “+”, leftshift, right shift, “:”, “′”, “″”, “@”, backspace/delete, “!”, “,”, “.”,sym, and return/enter. The return/enter key 98 is associated with thefifth column 88, third row 64. Other keys are also associated with theface 30 of the housing 12, including a shift key 20, a caps key 90, acaps/caps lock key 74, a space key 72, a power/backlight key 76, and athumb wheel 58. The shift key 20 is positioned above the lower section68 adjacent the upper section 66. The caps key 90 is positioned directlyabove the upper section 66 adjacent the thumb wheel 58. The thumb wheel58 is positioned below the display 16 above the upper section 66. Thecaps/caps lock key 74 and space bar 72 are positioned below the lowersection 68, and the power/backlight key 76 is positioned below the uppersection 66 adjacent the lower section 68. As is preferred, a caps key 90is associated with both the lower and upper sections 66, 68 such thatthe user can select capital or lower case letters with each thumb duringuse.

Other key arrangements may also be utilized with the example keyboard14, as long as the keyboard 14 is split into an upper section 66 and alower section 68, where at least part of the upper section 66 ispositioned above the lower section 68 and at least part of the lowersection 68 is positioned beneath the upper section 66.

It is preferred that the keys be positioned at an orientation and in aparticular shape that attempts to maximize the surface area of the thumbhitting the key and to provide the user with a comfortable position ofthe hands for data input. Also, the orientation should preferablyencourage input by the thumbs, which has been discovered to be fasterand more accurate in small hand-held electronic devices thantouch-typing or “hunting and pecking” typing. An example of preferredkey shapes and orientations is described in U.S. Pat. No. 6,278,442,file Jun. 29, 1998 and issued Aug. 21, 2001, and U.S. Design Pat. No.D416,256, filed Jun. 26, 1998 and issued Nov. 9, 1999, the disclosuresof which are hereby incorporated by reference in their entirety. Inaddition to hardware features that encourage optimal data entry throughthe use of thumbs, software features that are designed to minimizekeystrokes and aid data entry may also be provided. An example of amobile communication device having a keyboard assembly with hardware andsoftware associated with key entry is described in U.S. patentapplication Ser. Nos. 09/967,537; 09/976,536; 10/302,242; and U.S. Pat.No. 6,278,442, the disclosures of which are incorporated herein byreference in their entirety.

The mobile communication device 10 may also include software, such as apredictive text computer program, that is used in conjunction with thekeyboard 14. An example predictive text computer program is described inthe following co-owned patent applications, which are incorporatedherein by reference in their entirety: “Customizable Predictive TextMethod For Reduced Keyboards,” U.S. Provisional Patent Application No.60/397,680, filed Jul. 23, 2002; “Systems and Methods of Building andUsing Custom Word Lists,” International Patent Application No.PCT/CA03/01103, filed Jul. 23, 2003, and “Portable Electronic DeviceWith Keyboard”, International Patent Application No. PCT/CA02/00862,filed Jun. 10, 2002. In a multi-tap methodology, the user taps a keymultiple times until a desired letter, number, symbol, or function isselected. In the present case, a multi-tap method could be utilized toselect among the multiple characters or functions associated with eachkey, rather than the shift function 20.

Another technology involves predictive text methodologies. Thesemethodologies utilize database software to predict the entered text. Onemethod involves automatically correcting common spelling mistakes (e.g.,“teh” corrected to “the”). Predictive text methodologies use knownspellings of words in combination with their probabilities andfrequencies of use to determine a preferred word based upon inputcommands by a user. Disambiguation engines and predictive editorapplications may be used to establish a single grammatical or semanticinterpretation of the keystrokes entered by a user. With predictiveeditor applications, the display of the device depicts possiblecharacter sequences corresponding to the keystrokes that were entered.Typically, the most commonly used word is displayed first. The user mayselect other, less common words manually, or otherwise. Other types ofpredictive text computer programs may be utilized with the keyboard 14described herein, without limitation.

The handheld mobile communication devices 10, presented in FIGS. 4-9include similar features, such as a housing 12, a keyboard 14 and anoutput device 16. The output device shown is a display 16, which ispreferably a full graphic LCD. Other types of output devices mayalternatively be utilized. A processing device 18, which is shownschematically in FIG. 10, is contained within the housing 12 and iscoupled between the keyboard 14 and the display 16. The processingdevice 18 controls the operation of the display 16, as well as theoverall operation of the mobile communication device 10, in response toactuation of keys on the keyboard 14 by the user.

The housing 12 may be elongated vertically, or may take on other sizesand shapes. The keyboard may include a mode selection key, or otherhardware or software for switching between text entry and telephonyentry.

In addition to the processing device 18, other parts of the mobilecommunication device 10 are shown schematically in FIG. 10. Theseinclude a communications subsystem 100; a short-range communicationssubsystem; the keyboard 14 and the display 16, along with otherinput/output devices 106, 108, 110 and 112; as well as memory devices116, 118 and various other device subsystems 120. The mobilecommunication device 10 is preferably a two-way RF communication devicehaving voice and data communication capabilities. In addition, themobile communication device 10 preferably has the capability tocommunicate with other computer systems via the Internet.

Operating system software executed by the processing device 18 ispreferably stored in a persistent store, such as a flash memory 116, butmay be stored in other types of memory devices, such as a read onlymemory (ROM) or similar storage element. In addition, system software,specific device applications, or parts thereof, may be temporarilyloaded into a volatile store, such as a random access memory (RAM) 118.Communication signals received by the mobile communication device mayalso be stored to the RAM 118.

The processing device 18, in addition to its operating system functions,enables execution of software applications 130A-130N on the device 10. Apredetermined set of applications that control basic device operations,such as data and voice communications 130A and 130B, may be installed onthe device 10 during manufacture. In addition, a personal informationmanager (PIM) application may be installed during manufacture. The PIMis preferably capable of organizing and managing data items, such ase-mail, calendar events, voice mails, appointments, and task items. ThePIM application is also preferably capable of sending and receiving dataitems via a wireless network 140. Preferably, the PIM data items areseamlessly integrated, synchronized and updated via the wireless network140 with the device user's corresponding data items stored or associatedwith a host computer system. An example system and method foraccomplishing these steps is disclosed in “System And Method For PushingInformation From A Host System To A Mobile Device Having A SharedElectronic Address,” U.S. Pat. No. 6,219,694, which is owned by theassignee of the present application, and which is incorporated herein byreference.

Communication functions, including data and voice communications, areperformed through the communication subsystem 100, and possibly throughthe short-range communications subsystem. The communication subsystem100 includes a receiver 150, a transmitter 152, and one or more antennas154, 156. In addition, the communication subsystem 100 also includes aprocessing module, such as a digital signal processor (DSP) 158, andlocal oscillators (LOs) 160. The specific design and implementation ofthe communication subsystem 100 is dependent upon the communicationnetwork in which the mobile communication device 10 is intended tooperate. For example, a mobile communication device 10 may include acommunication subsystem 100 designed to operate with the Mobitex™, DataTAC™ or General Packet Radio Service (GPRS) mobile data communicationnetworks and also designed to operate with any of a variety of voicecommunication networks, such as AMPS, TDMA, CDMA, PCS, GSM, etc. Othertypes of data and voice networks, both separate and integrated, may alsobe utilized with the mobile communication device 10.

Network access requirements vary depending upon the type ofcommunication system. For example, in the Mobitex and DataTAC networks,mobile devices are registered on the network using a unique personalidentification number or PIN associated with each device. In GPRSnetworks, however, network access is associated with a subscriber oruser of a device. A GPRS device therefore requires a subscriber identitymodule, commonly referred to as a SIM card, in order to operate on aGPRS network.

When required network registration or activation procedures have beencompleted, the mobile communication device 10 may send and receivecommunication signals over the communication network 140. Signalsreceived from the communication network 140 by the antenna 154 arerouted to the receiver 150, which provides for signal amplification,frequency down conversion, filtering, channel selection, etc., and mayalso provide analog to digital conversion. Analog-to-digital conversionof the received signal allows the DSP 158 to perform more complexcommunication functions, such as demodulation and decoding. In a similarmanner, signals to be transmitted to the network 140 are processed (e.g.modulated and encoded) by the DSP 158 and are then provided to thetransmitter 152 for digital to analog conversion, frequency upconversion, filtering, amplification and transmission to thecommunication network 140 (or networks) via the antenna 156.

In addition to processing communication signals, the DSP 158 providesfor control of the receiver 150 and the transmitter 152. For example,gains applied to communication signals in the receiver 150 andtransmitter 152 may be adaptively controlled through automatic gaincontrol algorithms implemented in the DSP 158.

In a data communication mode, a received signal, such as a text messageor web page download, is processed by the communication subsystem 100and is input to the processing device 18. The received signal is thenfurther processed by the processing device 18 for an output to thedisplay 16, or alternatively to some other auxiliary I/O device 106. Adevice user may also compose data items, such as e-mail messages, usingthe keyboard 14 and/or some other auxiliary I/O device 106, such as atouchpad, a rocker switch, a thumb-wheel, or some other type of inputdevice. The composed data items may then be transmitted over thecommunication network 140 via the communication subsystem 100.

In a voice communication mode, overall operation of the device issubstantially similar to the data communication mode, except thatreceived signals are output to a speaker 110, and signals fortransmission are generated by a microphone 112. Alternative voice oraudio I/O subsystems, such as a voice message recording subsystem, mayalso be implemented on the device 10. In addition, the display 16 mayalso be utilized in voice communication mode, for example to display theidentity of a calling party, the duration of a voice call, or othervoice call related information.

The short-range communications subsystem enables communication betweenthe mobile communication device 10 and other proximate systems ordevices, which need not necessarily be similar devices. For example, theshort-range communications subsystem may include an infrared device andassociated circuits and components, or a Bluetooth™ communication moduleto provide for communication with similarly-enabled systems and devices.

While all of the examples depict a QWERTY arrangement of alphabeticcharacters, the examples are equally applicable to other standardarrangements, including, without limitation, QWERTZ, AZERTY, and DVORAK.

The keys may be toggle keys or non-toggle keys, if desired. Additionalor fewer rows and columns, above and beyond the number shown herein, mayalso be provided to position functional and other keys, if desired.Furthermore, the keys may be aligned in columns, or may be staggered, insome examples. Rows and/or columns may be straight, curved, orotherwise. For example, in one example, rows may be arcuate, similar tothat shown in the prior art keyboards of FIGS. 2 and 3. In addition,while round and oval keys are shown, other shaped keys may be utilized.In another example, the keys are oval shaped and positioned at an anglerelative to the longitudinal axis X-X of the mobile communication device10.

The word “substantially” if present is used herein as an estimationterm.

While various features of the claimed examples are presented above, itshould be understood that the features may be used singly or in anycombination thereof. Therefore, the claimed examples are not to belimited to only the specific examples depicted herein.

Further, it should be understood that variations and modifications mayoccur to those skilled in the art to which the claimed examples pertain.The examples described herein are exemplary. The disclosure may enablethose skilled in the art to make and use examples having alternativeelements that likewise correspond to the elements recited in the claims.The intended scope may thus include other examples that do not differ orthat insubstantially differ from the literal language of the claims. Thescope of the example embodiments is accordingly defined as set forth inthe appended claims.

1. A keyboard comprising: a plurality of keys having accompanyingalphabetic indicia and, when viewed from the front with the accompanyingalphabetic indicia in upright positions, being split into a left sidesection and a right side section, with each side section arranged inhorizontal rows of keys including a top row, a middle row, and a bottomrow respectively providing part of a top row, part of a middle row, andpart of a bottom row of a QWERTY array of the letters A-Z; wherein theleft side section is positioned at least partially above the right sidesection to define an upper section corresponding to the left sidesection and a lower section corresponding to the right side section,with at least part of the bottom row of the left side section positionedabove at least part of the top row of the right side section; or whereinthe right side section is positioned at least partially above the leftside section to define an upper section corresponding to the right sidesection and a lower section corresponding to the left side section, withat least part of the bottom row of the right side section positionedabove at least part of the top row of the left side section.
 2. Thekeyboard of claim 1, wherein all of the keys of the upper section arepositioned above all of the keys of the lower section.
 3. The keyboardof claim 1, wherein the upper section reaches horizontally over onlypart of the lower section.
 4. The keyboard of claim 1, wherein the uppersection includes keys associated with the alphabetic characters“QWERTASDFGZXCV”, and the lower section includes keys associated withthe alphabetic characters “YUIOPHJKLBNM”.
 5. The stationary keyboard ofclaim 1, wherein the upper section includes keys associated with thealphabetic characters “YUIOPHJKLBNM”, and the lower section includeskeys associated with the alphabetic characters “QWERTASDFGZXCV”.
 6. Thekeyboard of claim 1, wherein the upper section comprises at least threerows and five columns of keys, and the lower section comprises at leastthree rows and five columns of keys.
 7. The keyboard of claim 6, whereinthe five columns of the upper section are offset longitudinallyhorizontally from the five columns of the lower section.
 8. A mobilecommunication device comprising: a housing having a face; and thekeyboard of claim 1 located on the face of the housing.
 9. The mobilecommunication device of claim 8 wherein the left and right side sectionsare immovable relative to each other on the housing.
 10. A keyboardcomprising: a plurality of keys having accompanying alphabetic indiciaand, when viewed from the front with the accompanying alphabetic indiciain upright positions, being split into first and second sectionsarranged as a left side section and a right side section, with eachsection arranged in horizontal rows of keys including a top row, amiddle row, and a bottom row respectively providing part of a top row,part of a middle row, and part of a bottom row of a QWERTY array of theletters A-Z; wherein at least part of the bottom row of the firstsection is positioned above at least part of the top row of the secondsection.
 11. The keyboard of claim 10 wherein the first section is theright side section and the second section is the left side section. 12.The keyboard of claim 10 wherein the first section is the left sidesection and the second section is the right side section.
 13. Thekeyboard of claim 10 wherein the first section reaches horizontally overthe second section partially such that the first and second sections arepartially offset from each other horizontally.
 14. A mobilecommunication device comprising: a housing having a face; and thekeyboard of claim 10 located on the face of the housing.
 15. The mobilecommunication device of claim 14 wherein the first and second sectionsare immovable relative to each other on the housing.